<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>第一个vue实例</title>
  <script src="../vue.js"></script>
</head>

<body>
  <div class="div" id="app">{{msg}}</div>
  <script>
    let vue = new Vue({
      el: '#app',
      data: {
        msg: '第一个实例'
      }
    })
  </script>
</body>

</html>